add index.md
add index.md
add index.md
add task.md
task allocation after first meeting
task allocation after first meeting
task allocation after first meeting
First version of chap6

Please have it reviewed and pull request, thank you!
Change tables into snapshots from original book
delete html preview, remove /User/.../chap6
add back html file, and solve picture path problem
Add img folder to store images used in chap6.md
Update task.md

status update
Initial commit
try
Merge pull request #2 from kfeng123/develop

Develop
almost complete
almost complete
renling
Merge branch 'develop' of https://github.com/kfeng123/data-science into develop